My favourite strategy is to observe the Soviet base, specifically the War Factory, from a safe distance within my chronoshift zone. I do this in the hopes that the enemy will purchase a Demo Truck. If they do I will chronoshift into their base and destroy the trucks. If there are any defences I will try and shift to a blind spot.
I was able to do this a couple of weeks ago on KOTG. The enemy was planning a demo rush and purchased two Demo Trucks. As they were leaving I shifted to the front of the War Factory so the Tesla Coil could not zap me and shot the first truck, which when detonated